Compare 1991 vs 2041
| Property | 1991 | 2041 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 1811 | 131 × 1571 |
| Prime factorization | 11 × 181 | 13 × 157 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 181, 1991 | 1, 13, 157, 2041 |
| Number of properties | 1 | 1 |
| Semiprimes | 576th | 586th |
| Roman numberals | MCMXCI | MMXLI |
| Base 2 | 111110001112 | 111111110012 |
| Base 3 | 22012023 | 22101213 |
| Base 4 | 1330134 | 1333214 |
| Base 5 | 304315 | 311315 |
| Base 6 | 131156 | 132416 |
| Base 7 | 55437 | 56447 |
| Base 8 | 37078 | 37718 |
| Base 9 | 26529 | 27179 |
| Base 10 | 199110 | 204110 |
| Base 11 | 155011 | 159611 |
| Base 12 | 119b12 | 122112 |
| Base 13 | ba213 | c1013 |
| Base 14 | a2314 | a5b14 |
| Base 15 | 8cb15 | 91115 |
| Base 16 | 7c716 | 7f916 |